Heat olive oil in a large skillet over medium-high heat.
Season chicken breasts with salt and pepper on both sides.
Sear the chicken breasts for 5-7 minutes on each side until golden brown.
Remove chicken from the skillet and set aside.
Add minced garlic to the skillet and sauté until fragrant, about 30 seconds.
Pour in chicken broth and scrape the bottom of the skillet to deglaze.
Stir in heavy cream, Dijon mustard, dried thyme, and dried oregano.
Return chicken to the skillet and simmer for 5-10 minutes until the chicken is cooked through.
Taste and adjust seasoning with salt and pepper.
Garnish with fresh parsley before serving.